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From: Quentin Perret <qperret@qperret.net>
To: edubezval@gmail.com, rui.zhang@intel.com, javi.merino@kernel.org,
	viresh.kumar@linaro.org, amit.kachhap@gmail.com,
	rjw@rjwysocki.net, catalin.marinas@arm.com, will@kernel.org,
	daniel.lezcano@linaro.org
Cc: dietmar.eggemann@arm.com, ionela.voinescu@arm.com,
	mka@chromium.org, linux-pm@vger.kernel.org,
	linux-kernel@vger.kernel.org, qperret@qperret.net
Subject: [PATCH v8 1/4] arm64: defconfig: Enable CONFIG_ENERGY_MODEL
Date: Wed, 11 Sep 2019 15:03:11 +0200
Message-ID: <20190911130314.29973-2-qperret@qperret.net> (raw)
In-Reply-To: <20190911130314.29973-1-qperret@qperret.net>

From: Quentin Perret <quentin.perret@arm.com>

The recently introduced Energy Model (EM) framework manages power cost
tables for the CPUs of the system. Its only user right now is the
scheduler, in the context of Energy Aware Scheduling (EAS).

However, the EM framework also offers a generic infrastructure that
could replace subsystem-specific implementations of the same concepts,
as this is the case in the thermal framework.

So, in order to prepare the migration of the thermal subsystem to use
the EM framework, enable it in the default arm64 defconfig, which is the
most commonly used architecture for IPA. This will also compile-in all
of the EAS code, although it won't be enabled by default -- EAS requires
to use the 'schedutil' CPUFreq governor while arm64 defaults to
'performance'.

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 0e58ef02880c..ad0e4944a71f 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -71,6 +71,7 @@ CONFIG_COMPAT=y
 CONFIG_RANDOMIZE_BASE=y
 CONFIG_HIBERNATION=y
 CONFIG_WQ_POWER_EFFICIENT_DEFAULT=y
+CONFIG_ENERGY_MODEL=y
 CONFIG_ARM_CPUIDLE=y
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_STAT=y
-- 
2.22.1


  reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-11 13:03 [PATCH RESEND v8 0/4] Make IPA use PM_EM Quentin Perret
2019-09-11 13:03 ` Quentin Perret [this message]
2019-09-11 13:03 ` [PATCH v8 2/4] PM / EM: Declare EM data types unconditionally Quentin Perret
2019-09-11 13:03 ` [PATCH v8 3/4] thermal: cpu_cooling: Make the power-related code depend on IPA Quentin Perret
2019-09-11 13:03 ` [PATCH v8 4/4] thermal: cpu_cooling: Migrate to using the EM framework Quentin Perret
2019-10-07  5:35 ` [PATCH RESEND v8 0/4] Make IPA use PM_EM Daniel Lezcano
2019-10-07 13:37   ` Quentin Perret
2019-10-30 10:54     ` Daniel Lezcano
2019-10-30 11:44       ` Quentin Perret

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